Can you point out which words aren't natural and correct in my sentences? Kuihua noticed that Qingtong always likes to sit beside her and focuses his eyes on watching her writing and calculating when she was doing homework. His eyes was filled with envies and desires. In that day, all of a sudden, she came out an idea: I want to teach my brother with literacy! This idea was like a lighting illuminating upon her heart, which makes her surprised a lot and thrilled so much. She blamed herself, “Why wouldn’t I have come up to that idea”?